Elliptic spring



No. 770,496. PATBNTED SEPT; 20, 1904. 0. E. GOODYEAR. I

ELLIPTIG SPRING,

APPLICATION FILED APR. 28, 1904.

N0 MODEL.

WWZ/Cfl Y ,5@ a 47 UNITED STATES Patented September 20, 1904.

CHARLES E. GOODYEAR, OF BETHEL, OHIO.

ELLIPTIC SPRING.

SPECIFICATION forming part of Letters Patent No. 770,496, dated September 20, 1904,

' Application filed April 28, 1904. Serial No. 205,298. (N0 model.)

To @ZZ whom, it may concern:

Be it known that 1, CHARLES E. GOODYEAR, a citizen of the United States, and a resident of the town of Bethel, in the county of Clermont and State of Ohio, have invented an Improvement in Elliptic Springs, of which the following is a specification.

My invention is applicable to the various kinds of road-vehicles which require springs. The several features of my invention and the various advantages resulting from their use conjointly or otherwise will be apparent from the following description and claims.

In the accompanying drawings, making part of this application, and in which similar letters of reference indicate corresponding parts, Figure 1 represents in perspective a spring embodying my invention. Fig. 2. represents the spring applied to the front of a buggy. Fig. 3 represents the spring applied to the rear end of a buggy.

It is to be understood that this spring is to be applied to any part of a vehicle-gear as may be desired and that. in any suitable combination oneor more such springs may be employed upon the same vehicle. Among other than the mode shown in the drawings may be mentioned the combinatlon known as platform-springs.

I will now proceed to describe my invention in detail.

A indicates the double spring, B the upper half, and 13 the lower half thereof. Each half may consist of one or more leaves O. Other conditions of construction being the same, the increase in the number of leaves will increase the strength of the spring. The leaves are of thepeculiar and novel shape shownthat is to say, the portion O of the leaf is slightly curved or approximately straight. The center of the spring is much depressed, and this depressed portion is preferably curved at O This center portion O is united at each end to the adjacent portion O by a curve C substantially as shown.

When the double spring is employed, as shown in Figs. 1, 2, and 3, the central depressionO is preferably downward toward the slight curve O when present, of this central portion curves upward in the upper half of the spring'and downward in the lower half .of the spring. Each half of the spring is duly secured to its appropriate part of the gear by clips D or other well-known means located at the depressed center, substantially as shown. The curve C of each spring is a gentle and gradual one, and this gradual .change'. of direction in the material of the spring prevents the latter from being readily- I or portions O but also that of the corner or bent portions O at both the corners X and at the gradually-curved corners Y and to a certain limited extent in the central portion C The combined shape of the upper and lower l the groundin both halves of the spring; but

halves of the spring and the relative arrangement of their respective parts all unite to enable all the portions of the combined spring to operate harmoniously and-with great uniform and properly-graduated elasticity. the various modes of employing such springs What I claim as new and of my invention, and desire to secure by Letters Patent, is-

1. An elliptic or double spring, each half having a center (J and limbs C the limbs united to the center O by the curved portion O whose shoulder Xis united to the center O and whose gently-curved portion Y is united to the limb, the central portions O O being both depressed in the same direction, substantially as and for the purposes specified.

2. An elliptic or double spring, each half having a depressed central portion, and adjacent limbs united to the center by a curved portion, both central portions being depressed in the same direction, substantially as and for the purposes specified.

In witness whereof I have set my hand to this specification in the scribing witnesses.

CHARLES E. GOODYEAR. Attest':

WM. J. RIELLY, B. SMITH.

presence of two sub- 

